Simulation calculation of stable operation of isolated power grid based on grid-forming energy storage

To enhance the reliability of the power grid in islanded scenarios, a grid-forming energy storage system is proposed to maintain stable isolated power grid operation. First, establish a power supply structure and frequency modulation and voltage regulation control strategy for VSG-controlled grid-forming energy storage system. Secondly, a pre-synchronous grid-connected operation control strategy using the Clark transform method is presented to achieve smooth grid-connected operation of the energy storage system under operation of the isolated power grid. Finally, a simulation case analysis of the proposed method is carried out on. The simulation results indicate that the grid-forming energy storage system based on VSG control technology can ensure the stable operation of the isolated power grid.